S10 Series Step Control
Indeeco’s S10 series step controller does more to provide precision control for multi-stage applications. Common applications include HVAC duct heaters, industrial process heaters, circulation heaters and boilers.
Low voltage 24 VAC microcomputer-based stage controller
Capable of controlling 24, 120 or 240 VAC loads
10 stage controller with a pulsed 12 VDC vernier stage rated at 100 mA.
Up to 20 stages of control when using two units wired in a master & slave configuration
24 VDC power supply rated at 200 mA is available for an external sensor
Supports both linear and progressive operation modes
Micro-computer based control
Accuracy and reliability
Support for a wide selection of input signals
Field adjustable switches to support 6 predefined signals and DC voltage ranges anywhere between 0-20 VDC
Adjustable inter-stage delays
Field adjustable switches to support independent stage on and off delays
External power supply
24 VDC power supplied to support external sensors
Unit cycles down to full OFF if input leads are open, reversed or shorted
11 LED status lights provide detailed status information for troubleshooting
Functional test mode
Built-in test mode for quick troubleshooting
File E52105 Guide XAPX2/8
Storage & Operating Temp
-22° to 186°F (-30°C to 80°C)
Maximum operating temperature of 167°F (75°C) when supplied in enclosure (204 & 205 product code) with class 2 transformer.
240 VAC ±10%, 90VA max
208 VAC ±10%, 90VA max
120 VAC ±10%, 90VA max
24 VAC ±10%, 24VA max
Relay Wire Range: 10-24 AWG
24 VAC ±10%, 50/60 Hz
10.5 VA max – Base 10 stage operation with vernier output.
11.3 VA max – Additional power required for 24 VDC accessory outputs.
Power Supply Wire Range: 10-24 AWG
Impedance: 10KΩ for VDC inputs ; 250Ω for mA inputs
Input Signal Wire Range: 14-30 AWG
Auxiliary VDC Output
24 VDC ±10%, 200 mA max ; Wire Range 14-30 AWG
12 VDC pulsed, 100 mA max ; Wire Range 14-30 AWG
HVAC Duct Heaters
Industrial Process Air Applications
Customizable for Specific Applications